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The invention belongs to the technical field of preparation of nano porous materials, and relates to a preparation method of high-temperature-resistant SiOC aerogel. The preparation method comprises the following steps: by taking alkyl trialkoxy silane and dialkyl dialkoxy silane as raw materials, preparing a polyalkyl siloxane aerogel precursor with a macroporous structure by combining a sol-gel method and normal-pressure drying; and then carrying out high-temperature cracking on the polyalkyl siloxane aerogel precursor in an Ar atmosphere to prepare the SiOC aerogel. The preparation method is simple, and the prepared SiOC aerogel is good in block shape, low in density and low in heat conductivity, has a typical mesoporous structure and can be applied to the field of high-temperature heat insulation.
本发明属于纳米多孔材料制备技术领域，涉及一种耐高温SiOC气凝胶的制备方法。其制备方法是先以烷基三烷氧基硅烷、二烷基二烷氧基硅烷为原料，通过溶胶‑凝胶法和常压干燥结合制备具有大孔结构的聚烷基硅氧烷气凝胶先驱体；然后将聚烷基硅氧烷气凝胶先驱体在Ar气氛下进行高温裂解制备出SiOC气凝胶。本发明制备方法简单，制备的SiOC气凝胶成块型好、密度低、热导率低、具有典型的介孔结构，可应用于高温隔热领域。
The invention belongs to the technical field of preparation of nano porous materials, and relates to a preparation method of high-temperature-resistant SiOC aerogel. The preparation method comprises the following steps: by taking alkyl trialkoxy silane and dialkyl dialkoxy silane as raw materials, preparing a polyalkyl siloxane aerogel precursor with a macroporous structure by combining a sol-gel method and normal-pressure drying; and then carrying out high-temperature cracking on the polyalkyl siloxane aerogel precursor in an Ar atmosphere to prepare the SiOC aerogel. The preparation method is simple, and the prepared SiOC aerogel is good in block shape, low in density and low in heat conductivity, has a typical mesoporous structure and can be applied to the field of high-temperature heat insulation.
本发明属于纳米多孔材料制备技术领域，涉及一种耐高温SiOC气凝胶的制备方法。其制备方法是先以烷基三烷氧基硅烷、二烷基二烷氧基硅烷为原料，通过溶胶‑凝胶法和常压干燥结合制备具有大孔结构的聚烷基硅氧烷气凝胶先驱体；然后将聚烷基硅氧烷气凝胶先驱体在Ar气氛下进行高温裂解制备出SiOC气凝胶。本发明制备方法简单，制备的SiOC气凝胶成块型好、密度低、热导率低、具有典型的介孔结构，可应用于高温隔热领域。
Preparation method of high-temperature-resistant SiOC aerogel
一种耐高温SiOC气凝胶的制备方法
2022-03-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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